This is an important question, as the vast majority of high-end smartphone and other camera sensors are manufactured by them (Canon is the notable exception as

This is an important question, as the vast majority of high-end smartphone and other camera sensors are manufactured by them (Canon is the notable exception as a company that doesn't use Sony sensors) and it's a very profitable business. If I understand correctly from the official announcement the three sub-companies are going to be "Imaging Products & Solutions", "Home Entertainment & Sound" and "Mobile Communications" - the sensor business would fall pretty neatly into the first one.